Alveolar-Capillary Gas Exchange Diagram | Respiratory Physiology #3273115 (License: Personal Use)

This labeled anatomical illustration depicts the interface between a pulmonary alveolus and a capillary, emphasizing the alveolar wall, capillary wall, and red blood cells. The close proximity and thinness of these structures facilitate rapid diffusion of oxygen into the bloodstream and removal of carbon dioxide. Red blood cells are shown traversing the capillary lumen, underscoring their role in respiratory gas transport.

Used in educational resources, medical textbooks, and online physiology courses to explain pulmonary gas exchange; matches user intent for learning how oxygen enters blood and CO₂ is expelled.